WA cyclone weakens, but gales possible

Tropical Cyclone Narelle has weakened to a category three storm as it tracks southwest along the coast of Western Australia.

The Bureau of Meteorology said Narelle was about 300-400 kilometres off the coast of northern WA at 5am on Sunday.

The storm looks likely to continue its track parallel to the coastline and it's unlikely it will make landfall, but people living in coastal and island communities between Onslow and Coral Bay are being urged to take precautions.

If Narelle does moves closer to the coast, gales with wind gusts of up to 100km/h are expected to hit between Onslow and Cape Cuvier on Sunday and may extend south to Carnarvon later in the day.

Strong gales are expected as Cyclone Narelle passes by the WA coastline. Photo: Bureau of Meteorology

The Department of Fire and Emergency Services issued an alert for people living near Cape Cuvier, Carnarvon, Denham, Kalbarri, Northampton and Meekatharra for approaching thunderstorms at 10.20am Sunday.

They warn residents travelling could be dangerous and the weather, although not unusual could damage homes.